Simulation and Image Analysis of Strip Roughness Open-Channel Turbulence with Appreciable Surface Fluctuation

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

MICROPROCESSOR-BASED NOVEL VARIABLE STRUCTURE CONTROL FOR ROBOT MANIPULATOR

A new variable structure control scheme which consists of continuous adaptive gain feedback (PID and feed-forward controls is developed to achieve accurate decoupled model following in a class of nonlinear time-varying system in the presence of disturbances, parameter variations and nonlinear dynamic interactions. The method is based on modified model following control with an improved sliding mode, which results in reducing the undesirable chattering remarkably. In addition an external torque observer with which the effects of external disturbances including parameter variations are roughly canceled is constructed. Then the developed method is practically applied to decoupled model following motion control for a two-degrees-of-freedom manipulator powered by PWM transistor converter-fed servo motors. The overall control strategies are implemented with both NEC PC-9801F (Intel 8086 Microprocessor) and TITMS32020 (DSP). The DSP is a very attractive hardware for the realization of the robust and fast observer algorithm. It is confirmed by experiments that the position trajectories are smooth and track the desired trajectories (output models) accurately. It is found that this new controller is simple and easy to be designed, performs extremely satisfactorily and is superior to the “conventional” PID controller for the robot manipulator

ジドウシャ デザイン ニオケル フヘンセイ ト シンキセイ

自動車デザインの進化を歴史、文化、環境の視点で分析し、変化しない本質と状況によって変化する価値観の背景を定義、将来のモノ創りへの参考とする。Analyze the evolution of car design from the perspective of history, culture, and environment. Define the background of the nature ofthings remains unchanged and people\u27s sense of value varying with situation. Use it as a reference for our future manufacturing

GUT, Neutrinos, and Baryogenesis

It is an exciting time for flavor physics. In this talk, I discuss recent topics in baryogenesis and leptogenesis in light of new data, and implications in B and neutrino physics. I also discuss current situation of grand unified theories concerning coupling unification, proton decay, and indirect consequences in lepton flavor violation and B physics. I explain attempts to understand the origin of flavor based on flavor symmetry, in particular "anarchy" in neutrinos.Comment: Talk presented at 5th KEK Topical Conference: Frontiers In Flavor Physics, 20-22 Nov 2001, Tsukuba, Ibaraki, Japan. Includes comments on SUSY GUT contribution to B->phi K

Roles of Piwi Proteins in Transcriptional Regulation Mediated by HP1s in Cultured Silkworm Cells

Piwi proteins are part of a superfamily of Argonaute proteins, which are one of the core components of the RNA silencing pathway in many eukaryotes. Piwi proteins are thought to repress the transposon expression both transcriptionally and post-transcriptionally. Recently, Drosophila melanogaster Piwi was recently reported to associate with chromatin and to interact directly with the Heterochromatin Protein 1 (HP1a). However, similar interactions have not been reported in other higher eukaryotes. Here we show that silkworm Piwi proteins interact with HP1s in the nucleus. The silkworm, Bombyx mori, has two Piwi proteins, Ago3 and Siwi, and two typical HP1 proteins, HP1a and HP1b. We found that HP1a plays an important role in the interaction between Ago3/Siwi and HP1b in the ovary-derived BmN4 cell line. We also found that Ago3/Siwi regulates the transcription in an HP1-dependent manner. These results suggest that silkworm Piwi proteins function as a chromatin regulator in collaboration with HP1a and HP1b

Mechanical Properties and Histological Evaluation of Bone Grafting Materials Containing Different Ratios of Calcium Phosphate Cement and Porous β-tricalcium Phosphate Granules

Article信州医学雑誌 66(2): 139-150(2018)journal articl

Drosophila PQBP1 Regulates Learning Acquisition at Projection Neurons in Aversive Olfactory Conditioning

Polyglutamine tract-binding protein-1 (PQBP1) is involved in the transcription-splicing coupling, and its mutations cause a group of human mental retardation syndromes. We generated a fly model in which the Drosophila homolog of PQBP1 (dPQBP1) is repressed by insertion of piggyBac. In classical odor conditioning, learning acquisition was significantly impaired in homozygous piggyBac-inserted flies, whereas the following memory retention was completely normal. Mushroom bodies (MBs) and antennal lobes were morphologically normal in dPQBP1-mutant flies. Projection neurons (PNs) were not reduced in number and their fiber connections were not changed, whereas gene expressions including NMDA receptor subunit 1 (NR1) were decreased in PNs. Targeted double-stranded RNA-mediated silencing of dPQBP1 in PNs, but not in MBs, similarly disrupted learning acquisition. NR1 overexpression in PNs rescued the learning disturbance of dPQBP1 mutants. HDAC (histone deacetylase) inhibitors, SAHA (suberoylanilide hydroxamic acid) and PBA (phenylbutyrate), that upregulated NR1 partially rescued the learning disturbance. Collectively, these findings identify dPQBP1 as a novel gene regulating learning acquisition at PNs

On Preserving a B+L Asymmetry Produced in the Early Universe

One of the most efficient mechanisms for producing the baryon asymmetry of the Universe is the decay of scalar condensates in a SUSY GUT as was first suggested by Affleck and Dine. We show that given a large enough asymmetry, the baryon number will be preserved down to low temperatures even if B - L = 0, because the baryon number carrying scalars form bose condensates that give the W a mass. We derive the conditions on the condensate needed to suppress electroweak sphaleron interactions which would otherwise drive the baryon asymmetry to zero when B - L = 0.Comment: 10 pages, LaTeX, UMN-TH-1240, CfPA-TH-94-13, LBL-3527